1,720,959 research outputs found
Scanning tunneling microscopy and spectroscopy of topological materials and heterostructures in thin films and devices
Get PDFThis dissertation reports the results of scanning tunneling microscopy experiments probing the physics of thin films of topological materials. A 3D topological insulator Bi2Te3 and a 2D topological insulator WTe2, grown epitaxially, are studied with atomic resolution, and their physics is probed using in-situ back gating. The development of the back-gating process in a scanning tunneling microscope is one of the main results of this work and is reported in detail. The band structure of the monolayer WTe2 is observed to be drastically changing upon the application of electric field through the back gate. The complex effect of the gate-induced electric field on monolayer WTe2 is explored and discussed. A study of the spatial extent of 1D edge states of WTe2 is presented. A new process combining nanopatterned superconductors and topological materials is proposed and implemented. The proposed geometry in devices suitable for scanning tunneling microscopy studies opens up many new possibilities to explore the proximity effect in topological materials for future Majorana platform realization.Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2022-05-01The student, Yulia Maximenko, accepted the attached license on 2020-04-02 at 03:39.The student, Yulia Maximenko, submitted this Dissertation for approval on 2020-04-02 at 03:46.This Dissertation was approved for publication on 2020-04-06 at 14:22.DSpace SAF Submission Ingestion Package generated from Vireo submission #14932 on 2020-08-25 at 17:39:50Made available in DSpace on 2020-08-27T00:49:52Z (GMT). No. of bitstreams: 2
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Previous issue date: 2020-04-06Embargo set by: Seth Robbins for item 115855
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Reason: Author requested closed access (OA after 2yrs) in Vireo ETD systemEmbargo set by: Seth Robbins for item 115855
Lift date: 2022-08-27T00:51:40Z
Reason: Author requested closed access (OA after 2yrs) in Vireo ETD systemAuthor requested closed access (OA after 2yrs) in Vireo ETD systemLimite
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Get PDF“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Get PDFWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Islands of Silicon Nanoparticles
Get PDF"This image is a result of electrospray deposition of ultra-small luminescent 3 nm silicon nanoparticles from alcohol solution. The nanoparticles are deposited onto a silicon wafer and imaged with atomic force microscope. The pedestals of the ""islands"" are single-nanoparticle (3 nm) layers while the ""peaks"" contain several nanoparticles on top of each other. Vertical scale is elongated compared to lateral dimensions.The average diameter of an island is 200 microns. In our research we study different aspects of physics and applications of Si nanoparticles: from biomedicine to high energy. The electrospray is used for thin film deposition and for fabrication and studying single layer formations of nanoparticles. Si nanoparticles are applied in electronic devices, solar cells, UV detectors, displays, luminescent microcontainers for imaging and tracking and are proposed to be used in cancer treatment."Submitted by [email protected] ([email protected]) on 2014-05-14T17:53:39Z
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Previous issue date: 2014-0
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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